Adhesive sheet and adhesive agent

Abstract

To easily separate an adhesive sheet and an adhesive agent adhered to an adherend leaving almost no residues thereof to the adherend, the thermo-melting micro-capsule internally including a mold releasing agent dispersed within the adhesive agent layer, the adhesive agent layer is thereby easily separated from the adherend leaving almost no residues on the adherend by only heating the layer. Moreover, gaps can be formed in the adhesive agent layer through expansion of a thermo-expanding particle by adding the thermo-expanding particle to the adhesive agent layer and thereby an adhesive force of the adhesive agent layer is remarkably lowered by the mold releasing agent penetrating into such gaps.

1 . An adhesive sheet comprising: 
 a base material;    an adhesive agent layer formed over the base material;    wherein the adhesive agent layer includes at least one thermo-melting micro-capsule with a mold releasing agent inside the thermo-melting micro-capsule.    
   
   
       2 . The adhesive sheet according to  claim 1 , wherein the mold releasing agent is mixed in a range of 1 to 20 wt % of the adhesive layer.  
   
   
       3 . The adhesive sheet according to  claim 1 , wherein the base material includes a conductive material or a magnetic material.  
   
   
       4 . The adhesive sheet according to  claim 1 , wherein the thermo-melting micro-capsule melts within the temperature range from 60 to 150° C.  
   
   
       5 . The adhesive sheet according to  claim 1 , wherein the thermo-melting micro-capsule has an average particle size in the range from 1 to 50 μm.  
   
   
       6 . The adhesive sheet according to  claim 1 , wherein the adhesive agent layer is formed of a first layer including the thermo-melting micro-capsule with the mold releasing agent inside the micro-capsule and a second layer formed of only an adhesive agent.  
   
   
       7 . The adhesive sheet according to  claim 6 , wherein the first layer is provided at the surface opposing to an adherend.  
   
   
       8 . The adhesive sheet according to  claim 1 , wherein the adhesive agent layer includes a thermo-expanding particle.  
   
   
       9 . The adhesive sheet according to  claim 1 , wherein the thermo-melting micro-capsule includes a thermo-expanding particle inside said micro-capsule.  
   
   
       10 . The adhesive sheet according to  claim 9 , wherein the adhesive agent layer further includes the thermo-expanding particle outside said micro-capsule.  
   
   
       11 . The adhesive sheet according to  claim 8 , wherein the thermo-expanding particle starts thermal expansion in a temperature range from 80 to 200° C.  
   
   
       12 . An adhesive agent comprising: 
 a thermo-melting micro-capsule internally including a mold releasing agent.    
   
   
       13 . The adhesive agent according to  claim 12 , wherein the adhesive agent includes a thermo-expanding particle.  
   
   
       14 . The adhesive agent according to  claim 12 , wherein the thermo-melting micro-capsule includes the thermo-expanding particle inside said micro-capsule.  
   
   
       15 . The adhesive agent according to  claim 14 , wherein the adhesive agent further includes the thermo-expanding particle outside said micro-capsule.  
   
   
       16 . The adhesive sheet according to  claim 1 , wherein the material of the thermo melting micro-capsule is at least one of the group consisting of vinyliden chloride.acrylonitryl copolymer, polyvinyl-alcohol, polyvinyl-buthylar, polymethyl-methacrylate, polyacrylo-nitrile, vinyliden polychloride, and polysulfon, melamine.formaldehyde resin and isocyanate resin.  
   
   
       17 . The adhesive agent according to  claim 12 , wherein the material of the thermo melting micro-capsule is at least one of the group consisting of vinyliden chloride.acrylonitryl copolymer, polyvinyl-alcohol, polyvinyl-buthylar, polymethyl-methacrylate, polyacrylo-nitrile, vinyliden polychloride, and polysulfon, melamine.formaldehyde resin and isocyanate resin.  
   
   
       18 . The adhesive sheet according to  claim 1  wherein the material of the adhesive agent layer comprises at least one member selected from the group consisting of: a rubber system, acrylic system, vinyl-alkyl-ether system, silicon system, polyester system, polyamide system, urethane system and stylene-diene block copolymer system.  
   
   
       19 . The adhesive sheet according to  claim 1  wherein the material of the adhesive agent layer is at least one selected from the group consisting of: 
 a rubber system adhesive agent including natural rubber and synthetic rubber as the base polymer, and an acrylic system adhesive agent including as the base polymer an acrylic system polymer using one or more acrylic acid systems.    
   
   
       20 . The adhesive agent according to  claim 19  wherein the material of the adhesive agent layer contains an additive agent of at least one of the group consisting of: a cross-linking agent, adhesive adding agent, plastic agent, filling agent and anti-aging agent.